For generations, the rats in the old junkyard have been telling each other the great legend about a moon made of cheese. And now they have made up their mind: they will build a rocket and take over the Cheese Moon! Of course, all the rats work together to achieve this magnificent goal. However, each rat family is also competing to build the most rocket parts and to train the most Rattronauts so they can feast on as much of the lunar cheese as possible.